Tested a couple of loads through 2 different .357's today - 6" bbl Ruger Security Six 4" bbl S&W 686. Some results were not expected but goes to show that results are not always predictable. There were absolutely no signs of excess pressure in these particular firearms with these particular component combination's. Load 1. - Bullet - Remington 158 gr JHP Powder - 16.2 gr H110 Case - New R-P Primer - CCI 550 Heavy roll crimp applied with Lee factory crimp die (1.5 turns past case mouth contact) Load 2. - Bullet - Cast RCBS 150 gr GC SWC (weight approximately 145 gr in linotype) Powder - 16.8 gr WW-296 Case - Once fired R-P Primer - CCI 550 Heavy roll crimp Chronograph - Pro Tach @ 10 feet from muzzle. Air temp approximately 40 degrees. 6 shots averaged. Pistols were thoroughly clean to start with a few shots fired to foul the bore before measuring. Ruger Security Six 6" with load 1 averaged 1360 fps. This load / pistol combo was the most consistent, with all but one shot within less than 10 fps of each other. Ruger Security Six 6" with load 2 averaged 1455 fps. Not quite as consistent as load 1. but not bad. S&W 686 4" with load 1 averaged 1225 fps S&W 686 4" with load 2 averaged 1223 fps. This was the big surprise. Not only was this velocity lower than load 1 for this pistol, but least consistent of all pistol / load combo's. It appears WW-296 likes the additional barrel length to achieve noticeably higher velocity as was the case with this load in the Ruger.